//Core code comes from https://github.com/davidshimjs/qrcodejs

// Background related code from https://github.com/SumiMakito/Awesome-qr.js

var QRCode;

(function() {
    /**
     * Get the type by string length
     * 
     * @private
     * @param {String} sText
     * @param {Number} nCorrectLevel
     * @return {Number} type
     */
    function _getTypeNumber(sText, nCorrectLevel) {
        var nType = 1;
        var length = _getUTF8Length(sText);

        for (var i = 0, len = QRCodeLimitLength.length; i <= len; i++) {
            var nLimit = 0;

            switch (nCorrectLevel) {
                case QRErrorCorrectLevel.L:
                    nLimit = QRCodeLimitLength[i][0];
                    break;
                case QRErrorCorrectLevel.M:
                    nLimit = QRCodeLimitLength[i][1];
                    break;
                case QRErrorCorrectLevel.Q:
                    nLimit = QRCodeLimitLength[i][2];
                    break;
                case QRErrorCorrectLevel.H:
                    nLimit = QRCodeLimitLength[i][3];
                    break;
            }

            if (length <= nLimit) {
                break;
            } else {
                nType++;
            }
        }

        if (nType > QRCodeLimitLength.length) {
            throw new Error("Too long data");
        }

        return nType;
    }

    function _getUTF8Length(sText) {
        var replacedText = encodeURI(sText).toString().replace(/\%[0-9a-fA-F]{2}/g, 'a');
        return replacedText.length + (replacedText.length != sText ? 3 : 0);
    }

    function QR8bitByte(data) {
        this.mode = QRMode.MODE_8BIT_BYTE;
        this.data = data;
        this.parsedData = [];

        // Added to support UTF-8 Characters
        for (var i = 0, l = this.data.length; i < l; i++) {
            var byteArray = [];
            var code = this.data.charCodeAt(i);

            if (code > 0x10000) {
                byteArray[0] = 0xF0 | ((code & 0x1C0000) >>> 18);
                byteArray[1] = 0x80 | ((code & 0x3F000) >>> 12);
                byteArray[2] = 0x80 | ((code & 0xFC0) >>> 6);
                byteArray[3] = 0x80 | (code & 0x3F);
            } else if (code > 0x800) {
                byteArray[0] = 0xE0 | ((code & 0xF000) >>> 12);
                byteArray[1] = 0x80 | ((code & 0xFC0) >>> 6);
                byteArray[2] = 0x80 | (code & 0x3F);
            } else if (code > 0x80) {
                byteArray[0] = 0xC0 | ((code & 0x7C0) >>> 6);
                byteArray[1] = 0x80 | (code & 0x3F);
            } else {
                byteArray[0] = code;
            }

            this.parsedData.push(byteArray);
        }

        this.parsedData = Array.prototype.concat.apply([], this.parsedData);

        if (this.parsedData.length != this.data.length) {
            this.parsedData.unshift(191);
            this.parsedData.unshift(187);
            this.parsedData.unshift(239);
        }
    }

    QR8bitByte.prototype = {
        getLength: function(buffer) {
            return this.parsedData.length;
        },
        write: function(buffer) {
            for (var i = 0, l = this.parsedData.length; i < l; i++) {
                buffer.put(this.parsedData[i], 8);
            }
        }
    };


    // QRCodeModel
    function QRCodeModel(typeNumber, errorCorrectLevel) {
        this.typeNumber = typeNumber;
        this.errorCorrectLevel = errorCorrectLevel;
        this.modules = null;
        this.moduleCount = 0;
        this.dataCache = null;
        this.dataList = [];
    }
    QRCodeModel.prototype = {
        addData: function(data) {
            var newData = new QR8bitByte(data);
            this.dataList.push(newData);
            this.dataCache = null;
        },
        isDark: function(row, col) {
            if (row < 0 || this.moduleCount <= row || col < 0 || this.moduleCount <= col) {
                throw new Error(row + "," + col);
            }
            return this.modules[row][col];
        },
        getModuleCount: function() {
            return this.moduleCount;
        },
        make: function() {
            this.makeImpl(false, this.getBestMaskPattern());
        },
        makeImpl: function(test, maskPattern) {
            this.moduleCount = this.typeNumber * 4 + 17;
            this.modules = new Array(this.moduleCount);
            for (var row = 0; row < this.moduleCount; row++) {
                this.modules[row] = new Array(this.moduleCount);
                for (var col = 0; col < this.moduleCount; col++) {
                    this.modules[row][col] = null;
                }
            }
            this.setupPositionProbePattern(0, 0);
            this.setupPositionProbePattern(this.moduleCount - 7, 0);
            this.setupPositionProbePattern(0, this.moduleCount - 7);
            this.setupPositionAdjustPattern();
            this.setupTimingPattern();
            this.setupTypeInfo(test, maskPattern);
            if (this.typeNumber >= 7) {
                this.setupTypeNumber(test);
            }
            if (this.dataCache == null) {
                this.dataCache = QRCodeModel.createData(this.typeNumber, this.errorCorrectLevel, this.dataList);
            }
            this.mapData(this.dataCache, maskPattern);
        },
        setupPositionProbePattern: function(row, col) {
            for (var r = -1; r <= 7; r++) {
                if (row + r <= -1 || this.moduleCount <= row + r) continue;
                for (var c = -1; c <= 7; c++) {
                    if (col + c <= -1 || this.moduleCount <= col + c) continue;
                    if ((0 <= r && r <= 6 && (c == 0 || c == 6)) || (0 <= c && c <= 6 && (r == 0 || r == 6)) || (2 <= r && r <= 4 && 2 <= c && c <= 4)) {
                        this.modules[row + r][col + c] = true;
                    } else {
                        this.modules[row + r][col + c] = false;
                    }
                }
            }
        },
        getBestMaskPattern: function() {
            var minLostPoint = 0;
            var pattern = 0;
            for (var i = 0; i < 8; i++) {
                this.makeImpl(true, i);
                var lostPoint = QRUtil.getLostPoint(this);
                if (i == 0 || minLostPoint > lostPoint) {
                    minLostPoint = lostPoint;
                    pattern = i;
                }
            }
            return pattern;
        },
        createMovieClip: function(target_mc, instance_name, depth) {
            var qr_mc = target_mc.createEmptyMovieClip(instance_name, depth);
            var cs = 1;
            this.make();
            for (var row = 0; row < this.modules.length; row++) {
                var y = row * cs;
                for (var col = 0; col < this.modules[row].length; col++) {
                    var x = col * cs;
                    var dark = this.modules[row][col];
                    if (dark) {
                        qr_mc.beginFill(0, 100);
                        qr_mc.moveTo(x, y);
                        qr_mc.lineTo(x + cs, y);
                        qr_mc.lineTo(x + cs, y + cs);
                        qr_mc.lineTo(x, y + cs);
                        qr_mc.endFill();
                    }
                }
            }
            return qr_mc;
        },
        setupTimingPattern: function() {
            for (var r = 8; r < this.moduleCount - 8; r++) {
                if (this.modules[r][6] != null) {
                    continue;
                }
                this.modules[r][6] = (r % 2 == 0);
            }
            for (var c = 8; c < this.moduleCount - 8; c++) {
                if (this.modules[6][c] != null) {
                    continue;
                }
                this.modules[6][c] = (c % 2 == 0);
            }
        },
        setupPositionAdjustPattern: function() {
            var pos = QRUtil.getPatternPosition(this.typeNumber);
            for (var i = 0; i < pos.length; i++) {
                for (var j = 0; j < pos.length; j++) {
                    var row = pos[i];
                    var col = pos[j];
                    if (this.modules[row][col] != null) {
                        continue;
                    }
                    for (var r = -2; r <= 2; r++) {
                        for (var c = -2; c <= 2; c++) {
                            if (r == -2 || r == 2 || c == -2 || c == 2 || (r == 0 && c == 0)) {
                                this.modules[row + r][col + c] = true;
                            } else {
                                this.modules[row + r][col + c] = false;
                            }
                        }
                    }
                }
            }
        },
        setupTypeNumber: function(test) {
            var bits = QRUtil.getBCHTypeNumber(this.typeNumber);
            for (var i = 0; i < 18; i++) {
                var mod = (!test && ((bits >> i) & 1) == 1);
                this.modules[Math.floor(i / 3)][i % 3 + this.moduleCount - 8 - 3] = mod;
            }
            for (var i = 0; i < 18; i++) {
                var mod = (!test && ((bits >> i) & 1) == 1);
                this.modules[i % 3 + this.moduleCount - 8 - 3][Math.floor(i / 3)] = mod;
            }
        },
        setupTypeInfo: function(test, maskPattern) {
            var data = (this.errorCorrectLevel << 3) | maskPattern;
            var bits = QRUtil.getBCHTypeInfo(data);
            for (var i = 0; i < 15; i++) {
                var mod = (!test && ((bits >> i) & 1) == 1);
                if (i < 6) {
                    this.modules[i][8] = mod;
                } else if (i < 8) {
                    this.modules[i + 1][8] = mod;
                } else {
                    this.modules[this.moduleCount - 15 + i][8] = mod;
                }
            }
            for (var i = 0; i < 15; i++) {
                var mod = (!test && ((bits >> i) & 1) == 1);
                if (i < 8) {
                    this.modules[8][this.moduleCount - i - 1] = mod;
                } else if (i < 9) {
                    this.modules[8][15 - i - 1 + 1] = mod;
                } else {
                    this.modules[8][15 - i - 1] = mod;
                }
            }
            this.modules[this.moduleCount - 8][8] = (!test);
        },
        mapData: function(data, maskPattern) {
            var inc = -1;
            var row = this.moduleCount - 1;
            var bitIndex = 7;
            var byteIndex = 0;
            for (var col = this.moduleCount - 1; col > 0; col -= 2) {
                if (col == 6) col--;
                while (true) {
                    for (var c = 0; c < 2; c++) {
                        if (this.modules[row][col - c] == null) {
                            var dark = false;
                            if (byteIndex < data.length) {
                                dark = (((data[byteIndex] >>> bitIndex) & 1) == 1);
                            }
                            var mask = QRUtil.getMask(maskPattern, row, col - c);
                            if (mask) {
                                dark = !dark;
                            }
                            this.modules[row][col - c] = dark;
                            bitIndex--;
                            if (bitIndex == -1) {
                                byteIndex++;
                                bitIndex = 7;
                            }
                        }
                    }
                    row += inc;
                    if (row < 0 || this.moduleCount <= row) {
                        row -= inc;
                        inc = -inc;
                        break;
                    }
                }
            }
        }
    };
    QRCodeModel.PAD0 = 0xEC;
    QRCodeModel.PAD1 = 0x11;
    QRCodeModel.createData = function(typeNumber, errorCorrectLevel, dataList) {
        var rsBlocks = QRRSBlock.getRSBlocks(typeNumber, errorCorrectLevel);
        var buffer = new QRBitBuffer();
        for (var i = 0; i < dataList.length; i++) {
            var data = dataList[i];
            buffer.put(data.mode, 4);
            buffer.put(data.getLength(), QRUtil.getLengthInBits(data.mode, typeNumber));
            data.write(buffer);
        }
        var totalDataCount = 0;
        for (var i = 0; i < rsBlocks.length; i++) {
            totalDataCount += rsBlocks[i].dataCount;
        }
        if (buffer.getLengthInBits() > totalDataCount * 8) {
            throw new Error("code length overflow. (" +
                buffer.getLengthInBits() +
                ">" +
                totalDataCount * 8 +
                ")");
        }
        if (buffer.getLengthInBits() + 4 <= totalDataCount * 8) {
            buffer.put(0, 4);
        }
        while (buffer.getLengthInBits() % 8 != 0) {
            buffer.putBit(false);
        }
        while (true) {
            if (buffer.getLengthInBits() >= totalDataCount * 8) {
                break;
            }
            buffer.put(QRCodeModel.PAD0, 8);
            if (buffer.getLengthInBits() >= totalDataCount * 8) {
                break;
            }
            buffer.put(QRCodeModel.PAD1, 8);
        }
        return QRCodeModel.createBytes(buffer, rsBlocks);
    };
    QRCodeModel.createBytes = function(buffer, rsBlocks) {
        var offset = 0;
        var maxDcCount = 0;
        var maxEcCount = 0;
        var dcdata = new Array(rsBlocks.length);
        var ecdata = new Array(rsBlocks.length);
        for (var r = 0; r < rsBlocks.length; r++) {
            var dcCount = rsBlocks[r].dataCount;
            var ecCount = rsBlocks[r].totalCount - dcCount;
            maxDcCount = Math.max(maxDcCount, dcCount);
            maxEcCount = Math.max(maxEcCount, ecCount);
            dcdata[r] = new Array(dcCount);
            for (var i = 0; i < dcdata[r].length; i++) {
                dcdata[r][i] = 0xff & buffer.buffer[i + offset];
            }
            offset += dcCount;
            var rsPoly = QRUtil.getErrorCorrectPolynomial(ecCount);
            var rawPoly = new QRPolynomial(dcdata[r], rsPoly.getLength() - 1);
            var modPoly = rawPoly.mod(rsPoly);
            ecdata[r] = new Array(rsPoly.getLength() - 1);
            for (var i = 0; i < ecdata[r].length; i++) {
                var modIndex = i + modPoly.getLength() - ecdata[r].length;
                ecdata[r][i] = (modIndex >= 0) ? modPoly.get(modIndex) : 0;
            }
        }
        var totalCodeCount = 0;
        for (var i = 0; i < rsBlocks.length; i++) {
            totalCodeCount += rsBlocks[i].totalCount;
        }
        var data = new Array(totalCodeCount);
        var index = 0;
        for (var i = 0; i < maxDcCount; i++) {
            for (var r = 0; r < rsBlocks.length; r++) {
                if (i < dcdata[r].length) {
                    data[index++] = dcdata[r][i];
                }
            }
        }
        for (var i = 0; i < maxEcCount; i++) {
            for (var r = 0; r < rsBlocks.length; r++) {
                if (i < ecdata[r].length) {
                    data[index++] = ecdata[r][i];
                }
            }
        }
        return data;
    };
    var QRMode = {
        MODE_NUMBER: 1 << 0,
        MODE_ALPHA_NUM: 1 << 1,
        MODE_8BIT_BYTE: 1 << 2,
        MODE_KANJI: 1 << 3
    };
    var QRErrorCorrectLevel = {
        L: 1,
        M: 0,
        Q: 3,
        H: 2
    };
    var QRMaskPattern = {
        PATTERN000: 0,
        PATTERN001: 1,
        PATTERN010: 2,
        PATTERN011: 3,
        PATTERN100: 4,
        PATTERN101: 5,
        PATTERN110: 6,
        PATTERN111: 7
    };
    var QRUtil = {
        PATTERN_POSITION_TABLE: [
            [],
            [6, 18],
            [6, 22],
            [6, 26],
            [6, 30],
            [6, 34],
            [6, 22, 38],
            [6, 24, 42],
            [6, 26, 46],
            [6, 28, 50],
            [6, 30, 54],
            [6, 32, 58],
            [6, 34, 62],
            [6, 26, 46, 66],
            [6, 26, 48, 70],
            [6, 26, 50, 74],
            [6, 30, 54, 78],
            [6, 30, 56, 82],
            [6, 30, 58, 86],
            [6, 34, 62, 90],
            [6, 28, 50, 72, 94],
            [6, 26, 50, 74, 98],
            [6, 30, 54, 78, 102],
            [6, 28, 54, 80, 106],
            [6, 32, 58, 84, 110],
            [6, 30, 58, 86, 114],
            [6, 34, 62, 90, 118],
            [6, 26, 50, 74, 98, 122],
            [6, 30, 54, 78, 102, 126],
            [6, 26, 52, 78, 104, 130],
            [6, 30, 56, 82, 108, 134],
            [6, 34, 60, 86, 112, 138],
            [6, 30, 58, 86, 114, 142],
            [6, 34, 62, 90, 118, 146],
            [6, 30, 54, 78, 102, 126, 150],
            [6, 24, 50, 76, 102, 128, 154],
            [6, 28, 54, 80, 106, 132, 158],
            [6, 32, 58, 84, 110, 136, 162],
            [6, 26, 54, 82, 110, 138, 166],
            [6, 30, 58, 86, 114, 142, 170]
        ],
        G15: (1 << 10) | (1 << 8) | (1 << 5) | (1 << 4) | (1 << 2) | (1 << 1) | (1 << 0),
        G18: (1 << 12) | (1 << 11) | (1 << 10) | (1 << 9) | (1 << 8) | (1 << 5) | (1 << 2) | (1 << 0),
        G15_MASK: (1 << 14) | (1 << 12) | (1 << 10) | (1 << 4) | (1 << 1),
        getBCHTypeInfo: function(data) {
            var d = data << 10;
            while (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G15) >= 0) {
                d ^= (QRUtil.G15 << (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G15)));
            }
            return ((data << 10) | d) ^ QRUtil.G15_MASK;
        },
        getBCHTypeNumber: function(data) {
            var d = data << 12;
            while (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G18) >= 0) {
                d ^= (QRUtil.G18 << (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G18)));
            }
            return (data << 12) | d;
        },
        getBCHDigit: function(data) {
            var digit = 0;
            while (data != 0) {
                digit++;
                data >>>= 1;
            }
            return digit;
        },
        getPatternPosition: function(typeNumber) {
            return QRUtil.PATTERN_POSITION_TABLE[typeNumber - 1];
        },
        getMask: function(maskPattern, i, j) {
            switch (maskPattern) {
                case QRMaskPattern.PATTERN000:
                    return (i + j) % 2 == 0;
                case QRMaskPattern.PATTERN001:
                    return i % 2 == 0;
                case QRMaskPattern.PATTERN010:
                    return j % 3 == 0;
                case QRMaskPattern.PATTERN011:
                    return (i + j) % 3 == 0;
                case QRMaskPattern.PATTERN100:
                    return (Math.floor(i / 2) + Math.floor(j / 3)) % 2 == 0;
                case QRMaskPattern.PATTERN101:
                    return (i * j) % 2 + (i * j) % 3 == 0;
                case QRMaskPattern.PATTERN110:
                    return ((i * j) % 2 + (i * j) % 3) % 2 == 0;
                case QRMaskPattern.PATTERN111:
                    return ((i * j) % 3 + (i + j) % 2) % 2 == 0;
                default:
                    throw new Error("bad maskPattern:" + maskPattern);
            }
        },
        getErrorCorrectPolynomial: function(errorCorrectLength) {
            var a = new QRPolynomial([1], 0);
            for (var i = 0; i < errorCorrectLength; i++) {
                a = a.multiply(new QRPolynomial([1, QRMath.gexp(i)], 0));
            }
            return a;
        },
        getLengthInBits: function(mode, type) {
            if (1 <= type && type < 10) {
                switch (mode) {
                    case QRMode.MODE_NUMBER:
                        return 10;
                    case QRMode.MODE_ALPHA_NUM:
                        return 9;
                    case QRMode.MODE_8BIT_BYTE:
                        return 8;
                    case QRMode.MODE_KANJI:
                        return 8;
                    default:
                        throw new Error("mode:" + mode);
                }
            } else if (type < 27) {
                switch (mode) {
                    case QRMode.MODE_NUMBER:
                        return 12;
                    case QRMode.MODE_ALPHA_NUM:
                        return 11;
                    case QRMode.MODE_8BIT_BYTE:
                        return 16;
                    case QRMode.MODE_KANJI:
                        return 10;
                    default:
                        throw new Error("mode:" + mode);
                }
            } else if (type < 41) {
                switch (mode) {
                    case QRMode.MODE_NUMBER:
                        return 14;
                    case QRMode.MODE_ALPHA_NUM:
                        return 13;
                    case QRMode.MODE_8BIT_BYTE:
                        return 16;
                    case QRMode.MODE_KANJI:
                        return 12;
                    default:
                        throw new Error("mode:" + mode);
                }
            } else {
                throw new Error("type:" + type);
            }
        },
        getLostPoint: function(qrCode) {
            var moduleCount = qrCode.getModuleCount();
            var lostPoint = 0;
            for (var row = 0; row < moduleCount; row++) {
                for (var col = 0; col < moduleCount; col++) {
                    var sameCount = 0;
                    var dark = qrCode.isDark(row, col);
                    for (var r = -1; r <= 1; r++) {
                        if (row + r < 0 || moduleCount <= row + r) {
                            continue;
                        }
                        for (var c = -1; c <= 1; c++) {
                            if (col + c < 0 || moduleCount <= col + c) {
                                continue;
                            }
                            if (r == 0 && c == 0) {
                                continue;
                            }
                            if (dark == qrCode.isDark(row + r, col + c)) {
                                sameCount++;
                            }
                        }
                    }
                    if (sameCount > 5) {
                        lostPoint += (3 + sameCount - 5);
                    }
                }
            }
            for (var row = 0; row < moduleCount - 1; row++) {
                for (var col = 0; col < moduleCount - 1; col++) {
                    var count = 0;
                    if (qrCode.isDark(row, col)) count++;
                    if (qrCode.isDark(row + 1, col)) count++;
                    if (qrCode.isDark(row, col + 1)) count++;
                    if (qrCode.isDark(row + 1, col + 1)) count++;
                    if (count == 0 || count == 4) {
                        lostPoint += 3;
                    }
                }
            }
            for (var row = 0; row < moduleCount; row++) {
                for (var col = 0; col < moduleCount - 6; col++) {
                    if (qrCode.isDark(row, col) && !qrCode.isDark(row, col + 1) && qrCode.isDark(row, col + 2) && qrCode.isDark(row, col + 3) && qrCode.isDark(row, col + 4) && !qrCode.isDark(row, col + 5) && qrCode.isDark(row, col + 6)) {
                        lostPoint += 40;
                    }
                }
            }
            for (var col = 0; col < moduleCount; col++) {
                for (var row = 0; row < moduleCount - 6; row++) {
                    if (qrCode.isDark(row, col) && !qrCode.isDark(row + 1, col) && qrCode.isDark(row + 2, col) && qrCode.isDark(row + 3, col) && qrCode.isDark(row + 4, col) && !qrCode.isDark(row + 5, col) && qrCode.isDark(row + 6, col)) {
                        lostPoint += 40;
                    }
                }
            }
            var darkCount = 0;
            for (var col = 0; col < moduleCount; col++) {
                for (var row = 0; row < moduleCount; row++) {
                    if (qrCode.isDark(row, col)) {
                        darkCount++;
                    }
                }
            }
            var ratio = Math.abs(100 * darkCount / moduleCount / moduleCount - 50) / 5;
            lostPoint += ratio * 10;
            return lostPoint;
        }
    };
    var QRMath = {
        glog: function(n) {
            if (n < 1) {
                throw new Error("glog(" + n + ")");
            }
            return QRMath.LOG_TABLE[n];
        },
        gexp: function(n) {
            while (n < 0) {
                n += 255;
            }
            while (n >= 256) {
                n -= 255;
            }
            return QRMath.EXP_TABLE[n];
        },
        EXP_TABLE: new Array(256),
        LOG_TABLE: new Array(256)
    };
    for (var i = 0; i < 8; i++) {
        QRMath.EXP_TABLE[i] = 1 << i;
    }
    for (var i = 8; i < 256; i++) {
        QRMath.EXP_TABLE[i] = QRMath.EXP_TABLE[i - 4] ^ QRMath.EXP_TABLE[i - 5] ^ QRMath.EXP_TABLE[i - 6] ^ QRMath.EXP_TABLE[i - 8];
    }
    for (var i = 0; i < 255; i++) {
        QRMath.LOG_TABLE[QRMath.EXP_TABLE[i]] = i;
    }

    function QRPolynomial(num, shift) {
        if (num.length == undefined) {
            throw new Error(num.length + "/" + shift);
        }
        var offset = 0;
        while (offset < num.length && num[offset] == 0) {
            offset++;
        }
        this.num = new Array(num.length - offset + shift);
        for (var i = 0; i < num.length - offset; i++) {
            this.num[i] = num[i + offset];
        }
    }
    QRPolynomial.prototype = {
        get: function(index) {
            return this.num[index];
        },
        getLength: function() {
            return this.num.length;
        },
        multiply: function(e) {
            var num = new Array(this.getLength() + e.getLength() - 1);
            for (var i = 0; i < this.getLength(); i++) {
                for (var j = 0; j < e.getLength(); j++) {
                    num[i + j] ^= QRMath.gexp(QRMath.glog(this.get(i)) + QRMath.glog(e.get(j)));
                }
            }
            return new QRPolynomial(num, 0);
        },
        mod: function(e) {
            if (this.getLength() - e.getLength() < 0) {
                return this;
            }
            var ratio = QRMath.glog(this.get(0)) - QRMath.glog(e.get(0));
            var num = new Array(this.getLength());
            for (var i = 0; i < this.getLength(); i++) {
                num[i] = this.get(i);
            }
            for (var i = 0; i < e.getLength(); i++) {
                num[i] ^= QRMath.gexp(QRMath.glog(e.get(i)) + ratio);
            }
            return new QRPolynomial(num, 0).mod(e);
        }
    };

    function QRRSBlock(totalCount, dataCount) {
        this.totalCount = totalCount;
        this.dataCount = dataCount;
    }
    QRRSBlock.RS_BLOCK_TABLE = [
        [1, 26, 19],
        [1, 26, 16],
        [1, 26, 13],
        [1, 26, 9],
        [1, 44, 34],
        [1, 44, 28],
        [1, 44, 22],
        [1, 44, 16],
        [1, 70, 55],
        [1, 70, 44],
        [2, 35, 17],
        [2, 35, 13],
        [1, 100, 80],
        [2, 50, 32],
        [2, 50, 24],
        [4, 25, 9],
        [1, 134, 108],
        [2, 67, 43],
        [2, 33, 15, 2, 34, 16],
        [2, 33, 11, 2, 34, 12],
        [2, 86, 68],
        [4, 43, 27],
        [4, 43, 19],
        [4, 43, 15],
        [2, 98, 78],
        [4, 49, 31],
        [2, 32, 14, 4, 33, 15],
        [4, 39, 13, 1, 40, 14],
        [2, 121, 97],
        [2, 60, 38, 2, 61, 39],
        [4, 40, 18, 2, 41, 19],
        [4, 40, 14, 2, 41, 15],
        [2, 146, 116],
        [3, 58, 36, 2, 59, 37],
        [4, 36, 16, 4, 37, 17],
        [4, 36, 12, 4, 37, 13],
        [2, 86, 68, 2, 87, 69],
        [4, 69, 43, 1, 70, 44],
        [6, 43, 19, 2, 44, 20],
        [6, 43, 15, 2, 44, 16],
        [4, 101, 81],
        [1, 80, 50, 4, 81, 51],
        [4, 50, 22, 4, 51, 23],
        [3, 36, 12, 8, 37, 13],
        [2, 116, 92, 2, 117, 93],
        [6, 58, 36, 2, 59, 37],
        [4, 46, 20, 6, 47, 21],
        [7, 42, 14, 4, 43, 15],
        [4, 133, 107],
        [8, 59, 37, 1, 60, 38],
        [8, 44, 20, 4, 45, 21],
        [12, 33, 11, 4, 34, 12],
        [3, 145, 115, 1, 146, 116],
        [4, 64, 40, 5, 65, 41],
        [11, 36, 16, 5, 37, 17],
        [11, 36, 12, 5, 37, 13],
        [5, 109, 87, 1, 110, 88],
        [5, 65, 41, 5, 66, 42],
        [5, 54, 24, 7, 55, 25],
        [11, 36, 12],
        [5, 122, 98, 1, 123, 99],
        [7, 73, 45, 3, 74, 46],
        [15, 43, 19, 2, 44, 20],
        [3, 45, 15, 13, 46, 16],
        [1, 135, 107, 5, 136, 108],
        [10, 74, 46, 1, 75, 47],
        [1, 50, 22, 15, 51, 23],
        [2, 42, 14, 17, 43, 15],
        [5, 150, 120, 1, 151, 121],
        [9, 69, 43, 4, 70, 44],
        [17, 50, 22, 1, 51, 23],
        [2, 42, 14, 19, 43, 15],
        [3, 141, 113, 4, 142, 114],
        [3, 70, 44, 11, 71, 45],
        [17, 47, 21, 4, 48, 22],
        [9, 39, 13, 16, 40, 14],
        [3, 135, 107, 5, 136, 108],
        [3, 67, 41, 13, 68, 42],
        [15, 54, 24, 5, 55, 25],
        [15, 43, 15, 10, 44, 16],
        [4, 144, 116, 4, 145, 117],
        [17, 68, 42],
        [17, 50, 22, 6, 51, 23],
        [19, 46, 16, 6, 47, 17],
        [2, 139, 111, 7, 140, 112],
        [17, 74, 46],
        [7, 54, 24, 16, 55, 25],
        [34, 37, 13],
        [4, 151, 121, 5, 152, 122],
        [4, 75, 47, 14, 76, 48],
        [11, 54, 24, 14, 55, 25],
        [16, 45, 15, 14, 46, 16],
        [6, 147, 117, 4, 148, 118],
        [6, 73, 45, 14, 74, 46],
        [11, 54, 24, 16, 55, 25],
        [30, 46, 16, 2, 47, 17],
        [8, 132, 106, 4, 133, 107],
        [8, 75, 47, 13, 76, 48],
        [7, 54, 24, 22, 55, 25],
        [22, 45, 15, 13, 46, 16],
        [10, 142, 114, 2, 143, 115],
        [19, 74, 46, 4, 75, 47],
        [28, 50, 22, 6, 51, 23],
        [33, 46, 16, 4, 47, 17],
        [8, 152, 122, 4, 153, 123],
        [22, 73, 45, 3, 74, 46],
        [8, 53, 23, 26, 54, 24],
        [12, 45, 15, 28, 46, 16],
        [3, 147, 117, 10, 148, 118],
        [3, 73, 45, 23, 74, 46],
        [4, 54, 24, 31, 55, 25],
        [11, 45, 15, 31, 46, 16],
        [7, 146, 116, 7, 147, 117],
        [21, 73, 45, 7, 74, 46],
        [1, 53, 23, 37, 54, 24],
        [19, 45, 15, 26, 46, 16],
        [5, 145, 115, 10, 146, 116],
        [19, 75, 47, 10, 76, 48],
        [15, 54, 24, 25, 55, 25],
        [23, 45, 15, 25, 46, 16],
        [13, 145, 115, 3, 146, 116],
        [2, 74, 46, 29, 75, 47],
        [42, 54, 24, 1, 55, 25],
        [23, 45, 15, 28, 46, 16],
        [17, 145, 115],
        [10, 74, 46, 23, 75, 47],
        [10, 54, 24, 35, 55, 25],
        [19, 45, 15, 35, 46, 16],
        [17, 145, 115, 1, 146, 116],
        [14, 74, 46, 21, 75, 47],
        [29, 54, 24, 19, 55, 25],
        [11, 45, 15, 46, 46, 16],
        [13, 145, 115, 6, 146, 116],
        [14, 74, 46, 23, 75, 47],
        [44, 54, 24, 7, 55, 25],
        [59, 46, 16, 1, 47, 17],
        [12, 151, 121, 7, 152, 122],
        [12, 75, 47, 26, 76, 48],
        [39, 54, 24, 14, 55, 25],
        [22, 45, 15, 41, 46, 16],
        [6, 151, 121, 14, 152, 122],
        [6, 75, 47, 34, 76, 48],
        [46, 54, 24, 10, 55, 25],
        [2, 45, 15, 64, 46, 16],
        [17, 152, 122, 4, 153, 123],
        [29, 74, 46, 14, 75, 47],
        [49, 54, 24, 10, 55, 25],
        [24, 45, 15, 46, 46, 16],
        [4, 152, 122, 18, 153, 123],
        [13, 74, 46, 32, 75, 47],
        [48, 54, 24, 14, 55, 25],
        [42, 45, 15, 32, 46, 16],
        [20, 147, 117, 4, 148, 118],
        [40, 75, 47, 7, 76, 48],
        [43, 54, 24, 22, 55, 25],
        [10, 45, 15, 67, 46, 16],
        [19, 148, 118, 6, 149, 119],
        [18, 75, 47, 31, 76, 48],
        [34, 54, 24, 34, 55, 25],
        [20, 45, 15, 61, 46, 16]
    ];
    QRRSBlock.getRSBlocks = function(typeNumber, errorCorrectLevel) {
        var rsBlock = QRRSBlock.getRsBlockTable(typeNumber, errorCorrectLevel);
        if (rsBlock == undefined) {
            throw new Error("bad rs block @ typeNumber:" + typeNumber + "/errorCorrectLevel:" + errorCorrectLevel);
        }
        var length = rsBlock.length / 3;
        var list = [];
        for (var i = 0; i < length; i++) {
            var count = rsBlock[i * 3 + 0];
            var totalCount = rsBlock[i * 3 + 1];
            var dataCount = rsBlock[i * 3 + 2];
            for (var j = 0; j < count; j++) {
                list.push(new QRRSBlock(totalCount, dataCount));
            }
        }
        return list;
    };
    QRRSBlock.getRsBlockTable = function(typeNumber, errorCorrectLevel) {
        switch (errorCorrectLevel) {
            case QRErrorCorrectLevel.L:
                return QRRSBlock.RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 0];
            case QRErrorCorrectLevel.M:
                return QRRSBlock.RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 1];
            case QRErrorCorrectLevel.Q:
                return QRRSBlock.RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 2];
            case QRErrorCorrectLevel.H:
                return QRRSBlock.RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 3];
            default:
                return undefined;
        }
    };

    function QRBitBuffer() {
        this.buffer = [];
        this.length = 0;
    }
    QRBitBuffer.prototype = {
        get: function(index) {
            var bufIndex = Math.floor(index / 8);
            return ((this.buffer[bufIndex] >>> (7 - index % 8)) & 1) == 1;
        },
        put: function(num, length) {
            for (var i = 0; i < length; i++) {
                this.putBit(((num >>> (length - i - 1)) & 1) == 1);
            }
        },
        getLengthInBits: function() {
            return this.length;
        },
        putBit: function(bit) {
            var bufIndex = Math.floor(this.length / 8);
            if (this.buffer.length <= bufIndex) {
                this.buffer.push(0);
            }
            if (bit) {
                this.buffer[bufIndex] |= (0x80 >>> (this.length % 8));
            }
            this.length++;
        }
    };
    var QRCodeLimitLength = [
        [17, 14, 11, 7],
        [32, 26, 20, 14],
        [53, 42, 32, 24],
        [78, 62, 46, 34],
        [106, 84, 60, 44],
        [134, 106, 74, 58],
        [154, 122, 86, 64],
        [192, 152, 108, 84],
        [230, 180, 130, 98],
        [271, 213, 151, 119],
        [321, 251, 177, 137],
        [367, 287, 203, 155],
        [425, 331, 241, 177],
        [458, 362, 258, 194],
        [520, 412, 292, 220],
        [586, 450, 322, 250],
        [644, 504, 364, 280],
        [718, 560, 394, 310],
        [792, 624, 442, 338],
        [858, 666, 482, 382],
        [929, 711, 509, 403],
        [1003, 779, 565, 439],
        [1091, 857, 611, 461],
        [1171, 911, 661, 511],
        [1273, 997, 715, 535],
        [1367, 1059, 751, 593],
        [1465, 1125, 805, 625],
        [1528, 1190, 868, 658],
        [1628, 1264, 908, 698],
        [1732, 1370, 982, 742],
        [1840, 1452, 1030, 790],
        [1952, 1538, 1112, 842],
        [2068, 1628, 1168, 898],
        [2188, 1722, 1228, 958],
        [2303, 1809, 1283, 983],
        [2431, 1911, 1351, 1051],
        [2563, 1989, 1423, 1093],
        [2699, 2099, 1499, 1139],
        [2809, 2213, 1579, 1219],
        [2953, 2331, 1663, 1273]
    ];

    // background related
    // https://github.com/SumiMakito/Awesome-qr.js
    // var QRUtil = {
    //     PATTERN_POSITION_TABLE: [
    //         [],
    //         [6, 18],
    //         [6, 22],
    //         [6, 26],
    //         [6, 30],
    //         [6, 34],
    //         [6, 22, 38],
    //         [6, 24, 42],
    //         [6, 26, 46],
    //         [6, 28, 50],
    //         [6, 30, 54],
    //         [6, 32, 58],
    //         [6, 34, 62],
    //         [6, 26, 46, 66],
    //         [6, 26, 48, 70],
    //         [6, 26, 50, 74],
    //         [6, 30, 54, 78],
    //         [6, 30, 56, 82],
    //         [6, 30, 58, 86],
    //         [6, 34, 62, 90],
    //         [6, 28, 50, 72, 94],
    //         [6, 26, 50, 74, 98],
    //         [6, 30, 54, 78, 102],
    //         [6, 28, 54, 80, 106],
    //         [6, 32, 58, 84, 110],
    //         [6, 30, 58, 86, 114],
    //         [6, 34, 62, 90, 118],
    //         [6, 26, 50, 74, 98, 122],
    //         [6, 30, 54, 78, 102, 126],
    //         [6, 26, 52, 78, 104, 130],
    //         [6, 30, 56, 82, 108, 134],
    //         [6, 34, 60, 86, 112, 138],
    //         [6, 30, 58, 86, 114, 142],
    //         [6, 34, 62, 90, 118, 146],
    //         [6, 30, 54, 78, 102, 126, 150],
    //         [6, 24, 50, 76, 102, 128, 154],
    //         [6, 28, 54, 80, 106, 132, 158],
    //         [6, 32, 58, 84, 110, 136, 162],
    //         [6, 26, 54, 82, 110, 138, 166],
    //         [6, 30, 58, 86, 114, 142, 170]
    //     ],
    //     G15: (1 << 10) | (1 << 8) | (1 << 5) | (1 << 4) | (1 << 2) | (1 << 1) | (1 << 0),
    //     G18: (1 << 12) | (1 << 11) | (1 << 10) | (1 << 9) | (1 << 8) | (1 << 5) | (1 << 2) | (1 << 0),
    //     G15_MASK: (1 << 14) | (1 << 12) | (1 << 10) | (1 << 4) | (1 << 1),
    //     getBCHTypeInfo: function (data) {
    //         var d = data << 10;
    //         while (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G15) >= 0) {
    //             d ^= (QRUtil.G15 << (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G15)))
    //         }
    //         return ((data << 10) | d) ^ QRUtil.G15_MASK
    //     },
    //     getBCHTypeNumber: function (data) {
    //         var d = data << 12;
    //         while (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G18) >= 0) {
    //             d ^= (QRUtil.G18 << (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G18)))
    //         }
    //         return (data << 12) | d
    //     },
    //     getBCHDigit: function (data) {
    //         var digit = 0;
    //         while (data != 0) {
    //             digit++;
    //             data >>>= 1
    //         }
    //         return digit
    //     },
    //     getPatternPosition: function (typeNumber) {
    //         return QRUtil.PATTERN_POSITION_TABLE[typeNumber - 1]
    //     },
    //     getMask: function (maskPattern, i, j) {
    //         switch (maskPattern) {
    //             case QRMaskPattern.PATTERN000:
    //                 return (i + j) % 2 == 0;
    //             case QRMaskPattern.PATTERN001:
    //                 return i % 2 == 0;
    //             case QRMaskPattern.PATTERN010:
    //                 return j % 3 == 0;
    //             case QRMaskPattern.PATTERN011:
    //                 return (i + j) % 3 == 0;
    //             case QRMaskPattern.PATTERN100:
    //                 return (Math.floor(i / 2) + Math.floor(j / 3)) % 2 == 0;
    //             case QRMaskPattern.PATTERN101:
    //                 return (i * j) % 2 + (i * j) % 3 == 0;
    //             case QRMaskPattern.PATTERN110:
    //                 return ((i * j) % 2 + (i * j) % 3) % 2 == 0;
    //             case QRMaskPattern.PATTERN111:
    //                 return ((i * j) % 3 + (i + j) % 2) % 2 == 0;
    //             default:
    //                 throw new Error("bad maskPattern:" + maskPattern)
    //         }
    //     },
    //     getErrorCorrectPolynomial: function (errorCorrectLength) {
    //         var a = new QRPolynomial([1], 0);
    //         for (var i = 0; i < errorCorrectLength; i++) {
    //             a = a.multiply(new QRPolynomial([1, QRMath.gexp(i)], 0))
    //         }
    //         return a
    //     },
    //     getLengthInBits: function (mode, type) {
    //         if (1 <= type && type < 10) {
    //             switch (mode) {
    //                 case QRMode.MODE_NUMBER:
    //                     return 10;
    //                 case QRMode.MODE_ALPHA_NUM:
    //                     return 9;
    //                 case QRMode.MODE_8BIT_BYTE:
    //                     return 8;
    //                 case QRMode.MODE_KANJI:
    //                     return 8;
    //                 default:
    //                     throw new Error("mode:" + mode)
    //             }
    //         } else if (type < 27) {
    //             switch (mode) {
    //                 case QRMode.MODE_NUMBER:
    //                     return 12;
    //                 case QRMode.MODE_ALPHA_NUM:
    //                     return 11;
    //                 case QRMode.MODE_8BIT_BYTE:
    //                     return 16;
    //                 case QRMode.MODE_KANJI:
    //                     return 10;
    //                 default:
    //                     throw new Error("mode:" + mode)
    //             }
    //         } else if (type < 41) {
    //             switch (mode) {
    //                 case QRMode.MODE_NUMBER:
    //                     return 14;
    //                 case QRMode.MODE_ALPHA_NUM:
    //                     return 13;
    //                 case QRMode.MODE_8BIT_BYTE:
    //                     return 16;
    //                 case QRMode.MODE_KANJI:
    //                     return 12;
    //                 default:
    //                     throw new Error("mode:" + mode)
    //             }
    //         } else {
    //             throw new Error("type:" + type)
    //         }
    //     },
    //     getLostPoint: function (qrCode) {
    //         var moduleCount = qrCode.getModuleCount();
    //         var lostPoint = 0;
    //         for (var row = 0; row < moduleCount; row++) {
    //             for (var col = 0; col < moduleCount; col++) {
    //                 var sameCount = 0;
    //                 var dark = qrCode.isDark(row, col);
    //                 for (var r = -1; r <= 1; r++) {
    //                     if (row + r < 0 || moduleCount <= row + r) {
    //                         continue
    //                     }
    //                     for (var c = -1; c <= 1; c++) {
    //                         if (col + c < 0 || moduleCount <= col + c) {
    //                             continue
    //                         }
    //                         if (r == 0 && c == 0) {
    //                             continue
    //                         }
    //                         if (dark == qrCode.isDark(row + r, col + c)) {
    //                             sameCount++
    //                         }
    //                     }
    //                 }
    //                 if (sameCount > 5) {
    //                     lostPoint += (3 + sameCount - 5)
    //                 }
    //             }
    //         }
    //         for (var row = 0; row < moduleCount - 1; row++) {
    //             for (var col = 0; col < moduleCount - 1; col++) {
    //                 var count = 0;
    //                 if (qrCode.isDark(row, col)) count++;
    //                 if (qrCode.isDark(row + 1, col)) count++;
    //                 if (qrCode.isDark(row, col + 1)) count++;
    //                 if (qrCode.isDark(row + 1, col + 1)) count++;
    //                 if (count == 0 || count == 4) {
    //                     lostPoint += 3
    //                 }
    //             }
    //         }
    //         for (var row = 0; row < moduleCount; row++) {
    //             for (var col = 0; col < moduleCount - 6; col++) {
    //                 if (qrCode.isDark(row, col) && !qrCode.isDark(row, col + 1) && qrCode.isDark(row, col + 2) && qrCode.isDark(row, col + 3) && qrCode.isDark(row, col + 4) && !qrCode.isDark(row, col + 5) && qrCode.isDark(row, col + 6)) {
    //                     lostPoint += 40
    //                 }
    //             }
    //         }
    //         for (var col = 0; col < moduleCount; col++) {
    //             for (var row = 0; row < moduleCount - 6; row++) {
    //                 if (qrCode.isDark(row, col) && !qrCode.isDark(row + 1, col) && qrCode.isDark(row + 2, col) && qrCode.isDark(row + 3, col) && qrCode.isDark(row + 4, col) && !qrCode.isDark(row + 5, col) && qrCode.isDark(row + 6, col)) {
    //                     lostPoint += 40
    //                 }
    //             }
    //         }
    //         var darkCount = 0;
    //         for (var col = 0; col < moduleCount; col++) {
    //             for (var row = 0; row < moduleCount; row++) {
    //                 if (qrCode.isDark(row, col)) {
    //                     darkCount++
    //                 }
    //             }
    //         }
    //         var ratio = Math.abs(100 * darkCount / moduleCount / moduleCount - 50) / 5;
    //         lostPoint += ratio * 10;
    //         return lostPoint
    //     }
    // };

    function getAverageRGB(data) {
        //data: {data, height, width}
        var blockSize = 5,
            defaultRGB = {
                r: 0,
                g: 0,
                b: 0
            },
            count = 0,
            i = -4,
            rgb = {
                r: 0,
                g: 0,
                b: 0
            },
            length;
        //     canvas = document.createElement('canvas'),
        //     context = canvas.getContext && canvas.getContext('2d'),
        //     data, width, height,

        // if (!context) {
        //     return defaultRGB;
        // }

        // height = canvas.height = imgEl.naturalHeight || imgEl.offsetHeight || imgEl.height;
        // width = canvas.width = imgEl.naturalWidth || imgEl.offsetWidth || imgEl.width;

        // context.drawImage(imgEl, 0, 0);

        // try {
        //     data = context.getImageData(0, 0, width, height);
        // } catch (e) {
        //     return defaultRGB;
        // }

        length = data.data.length;

        while ((i += blockSize * 4) < length) {
            if (data.data[i] > 200 || data.data[i + 1] > 200 || data.data[i + 2] > 200) continue;
            ++count;
            rgb.r += data.data[i];
            rgb.g += data.data[i + 1];
            rgb.b += data.data[i + 2];
        }

        rgb.r = ~~(rgb.r / count);
        rgb.g = ~~(rgb.g / count);
        rgb.b = ~~(rgb.b / count);

        return rgb;
    }

    function _fillRectWithMask(canvas, x, y, w, h, maskSrc, bDark) {
        //console.log("maskSrc=" + maskSrc);
        if (maskSrc === undefined) {
            canvas.fillRect(x, y, w, h);
        } else {
            canvas.drawImage(maskSrc, x, y, w, h, x, y, w, h);
            var fill_ = canvas.fillStyle;
            canvas.setFillStyle(bDark ? "rgba(0, 0, 0, .5)" : "rgba(255, 255, 255, .7)");
            canvas.fillRect(x, y, w, h);
            canvas.setFillStyle(fill_);
        }
    }

    function _drawAlignProtector(context, centerX, centerY, nWidth, nHeight) {
        context.clearRect((centerX - 2) * nWidth, (centerY - 2) * nHeight, 5 * nWidth, 5 * nHeight);
        context.fillRect((centerX - 2) * nWidth, (centerY - 2) * nHeight, 5 * nWidth, 5 * nHeight);
    }

    function _drawAlign(context, centerX, centerY, nWidth, nHeight) {
        context.fillRect((centerX - 2) * nWidth, (centerY - 2) * nHeight, nWidth, 4 * nHeight);
        context.fillRect((centerX + 2) * nWidth, (centerY - 2 + 1) * nHeight, nWidth, 4 * nHeight);
        context.fillRect((centerX - 2 + 1) * nWidth, (centerY - 2) * nHeight, 4 * nWidth, nHeight);
        context.fillRect((centerX - 2) * nWidth, (centerY + 2) * nHeight, 4 * nWidth, nHeight);
        context.fillRect(centerX * nWidth, centerY * nHeight, nWidth, nHeight);
    }

    function _prepareRoundedCornerClip(ctx, x, y, w, h, r) {
        ctx.beginPath();
        ctx.moveTo(x, y);
        ctx.arcTo(x + w, y, x + w, y + h, r);
        ctx.arcTo(x + w, y + h, x, y + h, r);
        ctx.arcTo(x, y + h, x, y, r);
        ctx.arcTo(x, y, x + w, y, r);
        ctx.closePath();
    }

    // QRCode object
    QRCode = function(canvasId, vOption) {
        this._htOption = {
            width: 256,
            height: 256,
            typeNumber: 4,
            colorDark: "#000000",
            colorLight: "#ffffff",
            correctLevel: QRErrorCorrectLevel.H,

            // test add
            // margin: 0,
            tempCanvasId: undefined,
            quality: 1,
            margin: 20,
            backgroundImage: undefined,
            backgroundDimming: 'rgba(0,0,0,0)',
            logoImage: undefined,
            logoScale: 0.2,
            logoMargin: 6,
            logoCornerRadius: 8,
            whiteMargin: true,
            dotScale: 0.35,
            maskedDots: false,
            autoColor: true,
            binarize: false,
            binarizeThreshold: 128,
        };

        if (typeof vOption === 'string') {
            vOption = {
                text: vOption
            };
        }

        // Overwrites options
        if (vOption) {
            for (var i in vOption) {
                this._htOption[i] = vOption[i];
            }
        }

        this._oQRCode = null;
        this.canvasId = canvasId

        if (this._htOption.text && this.canvasId) {
            this.makeCode(this._htOption.text);
        }
    };

    QRCode.prototype.makeCode = function(sText, callback) {
        this._oQRCode = new QRCodeModel(_getTypeNumber(sText, this._htOption.correctLevel), this._htOption.correctLevel);
        this._oQRCode.addData(sText);
        this._oQRCode.make();
        this.makeImage(callback);
    };

    QRCode.prototype.makeImage = function(callback) {
        var _oContext
        if (this._htOption.usingIn) {
            _oContext = wx.createCanvasContext(this.canvasId, this._htOption.usingIn)
        } else {
            _oContext = wx.createCanvasContext(this.canvasId)
        }
        var _htOption = this._htOption;
        var oQRCode = this._oQRCode

        var nCount = oQRCode.getModuleCount();
        var nWidth = _htOption.width / nCount;
        var nHeight = _htOption.height / nCount;
        var nRoundedWidth = Math.round(nWidth);
        var nRoundedHeight = Math.round(nHeight);

        if (_htOption.image && _htOption.image != '') {
            _oContext.drawImage(_htOption.image, 0, 0, _htOption.width, _htOption.height)
        }

        for (var row = 0; row < nCount; row++) {
            for (var col = 0; col < nCount; col++) {
                var bIsDark = oQRCode.isDark(row, col);
                var nLeft = col * nWidth;
                var nTop = row * nHeight;
                _oContext.setStrokeStyle(bIsDark ? _htOption.colorDark : _htOption.colorLight)
                // _oContext.setStrokeStyle('yellow')
                _oContext.setLineWidth(1)
                _oContext.setFillStyle(bIsDark ? _htOption.colorDark : _htOption.colorLight)
                // _oContext.setFillStyle('red')
                // if (bIsDark) {
                _oContext.fillRect(nLeft, nTop, nWidth, nHeight);
                // }

                // 안티 앨리어싱 방지 처리
                // if (bIsDark) {
                _oContext.strokeRect(
                    Math.floor(nLeft) + 0.5,
                    Math.floor(nTop) + 0.5,
                    nRoundedWidth,
                    nRoundedHeight
                );

                _oContext.strokeRect(
                    Math.ceil(nLeft) - 0.5,
                    Math.ceil(nTop) - 0.5,
                    nRoundedWidth,
                    nRoundedHeight
                );
                // }
                // _oContext.fillRect(
                //     Math.floor(nLeft) + 0.5,
                //     Math.floor(nTop) + 0.5,
                //     nRoundedWidth,
                //     nRoundedHeight
                // );
                // _oContext.fillRect(
                //     Math.ceil(nLeft) - 0.5,
                //     Math.ceil(nTop) - 0.5,
                //     nRoundedWidth,
                //     nRoundedHeight
                // );
                // _oContext.clearRect(
                //     Math.floor(nLeft) + 0.5,
                //     Math.floor(nTop) + 0.5,
                //     nRoundedWidth,
                //     nRoundedHeight
                // );
                // _oContext.clearRect(
                //     Math.ceil(nLeft) - 0.5,
                //     Math.ceil(nTop) - 0.5,
                //     nRoundedWidth,
                //     nRoundedHeight
                // );
            }
        }

        _oContext.draw(false, callback)
    };

    QRCode.prototype.testMakeCode = function(sText, image) {
        this._oQRCode = new QRCodeModel(_getTypeNumber(sText, this._htOption.correctLevel), this._htOption.correctLevel);
        this._oQRCode.addData(sText);
        this._oQRCode.make();
        var _htOption = this._htOption;
        if (image) {
            _htOption.backgroundImage = image
        }
        if (_htOption.backgroundImage !== undefined) {
            var canvasId = _htOption.tempCanvasId || this.canvasId
            const z = this
            let {
                backgroundImage
            } = _htOption
            var rawSize = _htOption.size;
            var rawMargin = _htOption.margin;

            if (rawMargin < 0 || rawMargin * 2 >= rawSize) {
                rawMargin = 0;
            }

            var margin = Math.ceil(rawMargin);

            var rawViewportSize = rawSize - 2 * rawMargin;

            let ctx = wx.createCanvasContext(canvasId, this)
            ctx.translate(margin, margin)
            ctx.drawImage(backgroundImage, 0, 0, rawViewportSize, rawViewportSize)
            ctx.draw(false, () => {
                wx.canvasGetImageData({
                    canvasId: canvasId,
                    x: margin,
                    y: margin,
                    width: rawViewportSize,
                    height: rawViewportSize,
                    success(res) {
                        // return
                        wx.getImageInfo({
                            src: backgroundImage,
                            success: function(imageInfo) {
                                z.testMake(res, imageInfo)
                            },
                        })
                    },
                })
            })
        } else {
            this.testMake();
        }
        // this.testMake(data, imageInfo);
    };
    QRCode.prototype.testMake = function(data, imageInfo) {
        var canvasId = this.canvasId
        var _htOption = this._htOption;
        var tempCanvasId = _htOption.tempCanvasId || this.canvasId
        var _oContext, _dContext;

        if (this._htOption.usingIn) {
            _oContext = wx.createCanvasContext(tempCanvasId, this._htOption.usingIn)
            _dContext = wx.createCanvasContext(canvasId, this._htOption.usingIn)
        } else {
            _oContext = wx.createCanvasContext(tempCanvasId)
            _dContext = wx.createCanvasContext(canvasId)
        }
        var oQRCode = this._oQRCode

        var nCount = oQRCode.getModuleCount();
        var nWidth = _htOption.width / nCount;
        var nHeight = _htOption.height / nCount;
        var nRoundedWidth = Math.round(nWidth);
        var nRoundedHeight = Math.round(nHeight);

        // var _elImage = this._elImage;
        // var _tCanvas = document.createElement("canvas");
        // var _oContext = _tCanvas.getContext("2d");
        // var _htOption = this._htOption;

        // var nCount = oQRCode.getModuleCount();
        var rawSize = _htOption.size;
        var rawMargin = _htOption.margin;
        var quality = _htOption.quality;

        rawSize *= quality;
        rawMargin *= quality;

        if (rawMargin < 0 || rawMargin * 2 >= rawSize) {
            rawMargin = 0;
        }

        var margin = Math.ceil(rawMargin);

        var rawViewportSize = rawSize - 2 * rawMargin;

        var whiteMargin = _htOption.whiteMargin;
        var backgroundDimming = _htOption.backgroundDimming;
        var nSize = Math.ceil(rawViewportSize / nCount);
        var viewportSize = nSize * nCount;
        var size = viewportSize + 2 * margin;

        console.log("rawSize", rawSize)
        console.log("rawViewportSize", rawViewportSize)
        console.log("nCount", nCount)
        console.log("margin", margin)
        console.log("whiteMargin", whiteMargin)
        console.log("nSize", nSize)
        console.log("viewportSize", viewportSize)
        console.log("size", size)

        var gifBackground = undefined;
        var gifFrames = undefined;

        // _tCanvas.width = size;
        // _tCanvas.height = size;

        var dotScale = _htOption.dotScale;
        // _elImage.style.display = "none";
        // n
        // this.clear();

        if (dotScale <= 0 || dotScale > 1) {
            throw new Error("Scale should be in range (0, 1).")
        }

        // var _maskCanvas = undefined;
        // var _mContext = undefined;

        if (_htOption.backgroundImage !== undefined) {
            if (_htOption.autoColor) {
                // var avgRGB = getAverageRGB(_htOption.backgroundImage);
                var avgRGB = getAverageRGB(data);
                _htOption.colorDark = "rgb(" + avgRGB.r + ", " + avgRGB.g + ", " + avgRGB.b + ")";
            }

            // 太慢
            // if (_htOption.maskedDots) {
            if (false) {
                _oContext.drawImage(_htOption.backgroundImage,
                    0, 0, imageInfo.width, imageInfo.height,
                    0, 0, viewportSize, viewportSize);

                _oContext.draw(false,()=>{
                    wx.canvasToTempFilePath({
                        canvasId: tempCanvasId,
                        width: viewportSize,
                        height: viewportSize,
                        quality: 1.0,
                        success: res => {
                            step1(res.tempFilePath)
                        }
                    })
                })
                return
            } else {
                _oContext.drawImage(_htOption.backgroundImage,
                    0, 0, imageInfo.width, imageInfo.height,
                    0, 0, viewportSize, viewportSize);
                _oContext.setFillStyle(backgroundDimming);
                _oContext.fillRect(0, 0, viewportSize, viewportSize);
            }
        } else {
            // n
            _oContext.setFillStyle = "#ffffff";
            _oContext.fillRect(0, 0, viewportSize, viewportSize);
        }

        step1()
        function step1(maskSrc) {
            if (_htOption.binarize) {
                _htOption.colorDark = "#000000";
                _htOption.colorLight = "#FFFFFF";
            }

            var agnPatternCenter = QRUtil.getPatternPosition(oQRCode.typeNumber);

            // _oContext.draw(false)
            var xyOffset = (1 - dotScale) * 0.5;
            for (var row = 0; row < nCount; row++) {
                for (var col = 0; col < nCount; col++) {
                    var bIsDark = oQRCode.isDark(row, col);

                    // var isBlkPosCtr = ((col < 8 && (row < 8 || row >= nCount - 8)) || (col >= nCount - 8 && row < 8) || (col < nCount - 4 && col >= nCount - 4 - 5 && row < nCount - 4 && row >= nCount - 4 - 5));
                    var isBlkPosCtr = ((col < 8 && (row < 8 || row >= nCount - 8)) || (col >= nCount - 8 && row < 8));
                    var isBlkPos = ((col < 7 && (row < 7 || row >= nCount - 7)) || (col >= nCount - 7 && row < 7));
                    var bProtected = (row === 6 || col === 6 || isBlkPosCtr);

                    for (var i = 0; i < agnPatternCenter.length - 1; i++) {
                        bProtected = bProtected || (row >= agnPatternCenter[i] - 2 && row <= agnPatternCenter[i] + 2 && col >= agnPatternCenter[i] - 2 && col <= agnPatternCenter[i] + 2);
                    }

                    var nLeft = col * nSize + (bProtected ? 0 : (xyOffset * nSize));
                    var nTop = row * nSize + (bProtected ? 0 : (xyOffset * nSize));
                    // _oContext.strokeStyle = bIsDark ? _htOption.colorDark : _htOption.colorLight;
                    _oContext.setStrokeStyle(bIsDark ? _htOption.colorDark : _htOption.colorLight)
                    _oContext.setLineWidth(0.5);
                    _oContext.setFillStyle(bIsDark ? _htOption.colorDark : "rgba(255, 255, 255, 0.6)"); //_htOption.colorLight;
                    if (agnPatternCenter.length === 0) {
                        // if align pattern list is empty, then it means that we don't need to leave room for the align patterns
                        if (!bProtected)
                            _fillRectWithMask(_oContext, nLeft, nTop, (bProtected ? (isBlkPosCtr ? 1 : 1) : dotScale) * nSize, (bProtected ? (isBlkPosCtr ? 1 : 1) : dotScale) * nSize, maskSrc, bIsDark);
                    } else {
                        var inAgnRange = ((col < nCount - 4 && col >= nCount - 4 - 5 && row < nCount - 4 && row >= nCount - 4 - 5));
                        if (!bProtected && !inAgnRange)
                            _fillRectWithMask(_oContext, nLeft, nTop, (bProtected ? (isBlkPosCtr ? 1 : 1) : dotScale) * nSize, (bProtected ? (isBlkPosCtr ? 1 : 1) : dotScale) * nSize, maskSrc, bIsDark);
                    }
                }
            }

            // Draw POSITION protectors
            var protectorStyle = "rgba(255, 255, 255, 0.6)";
            _oContext.setFillStyle(protectorStyle);
            _oContext.fillRect(0, 0, 8 * nSize, 8 * nSize);
            _oContext.fillRect(0, (nCount - 8) * nSize, 8 * nSize, 8 * nSize);
            _oContext.fillRect((nCount - 8) * nSize, 0, 8 * nSize, 8 * nSize);
            _oContext.fillRect(8 * nSize, 6 * nSize, (nCount - 8 - 8) * nSize, nSize);
            _oContext.fillRect(6 * nSize, 8 * nSize, nSize, (nCount - 8 - 8) * nSize);

            // Draw ALIGN protectors
            var edgeCenter = agnPatternCenter[agnPatternCenter.length - 1];
            for (var i = 0; i < agnPatternCenter.length; i++) {
                for (var j = 0; j < agnPatternCenter.length; j++) {
                    var agnX = agnPatternCenter[j];
                    var agnY = agnPatternCenter[i];
                    if (agnX === 6 && (agnY === 6 || agnY === edgeCenter)) {
                        continue;
                    } else if (agnY === 6 && (agnX === 6 || agnX === edgeCenter)) {
                        continue;
                    } else if (agnX !== 6 && agnX !== edgeCenter && agnY !== 6 && agnY !== edgeCenter) {
                        _drawAlignProtector(_oContext, agnX, agnY, nSize, nSize);
                    } else {
                        _drawAlignProtector(_oContext, agnX, agnY, nSize, nSize);
                    }
                    // console.log("agnX=" + agnX + ", agnY=" + agnX);
                }
            }

            // Draw POSITION patterns
            _oContext.setFillStyle(_htOption.colorDark);
            _oContext.fillRect(0, 0, 7 * nSize, nSize);
            _oContext.fillRect((nCount - 7) * nSize, 0, 7 * nSize, nSize);
            _oContext.fillRect(0, 6 * nSize, 7 * nSize, nSize);
            _oContext.fillRect((nCount - 7) * nSize, 6 * nSize, 7 * nSize, nSize);
            _oContext.fillRect(0, (nCount - 7) * nSize, 7 * nSize, nSize);
            _oContext.fillRect(0, (nCount - 7 + 6) * nSize, 7 * nSize, nSize);
            _oContext.fillRect(0, 0, nSize, 7 * nSize);
            _oContext.fillRect(6 * nSize, 0, nSize, 7 * nSize);
            _oContext.fillRect((nCount - 7) * nSize, 0, nSize, 7 * nSize);
            _oContext.fillRect((nCount - 7 + 6) * nSize, 0, nSize, 7 * nSize);
            _oContext.fillRect(0, (nCount - 7) * nSize, nSize, 7 * nSize);
            _oContext.fillRect(6 * nSize, (nCount - 7) * nSize, nSize, 7 * nSize);

            _oContext.fillRect(2 * nSize, 2 * nSize, 3 * nSize, 3 * nSize);
            _oContext.fillRect((nCount - 7 + 2) * nSize, 2 * nSize, 3 * nSize, 3 * nSize);
            _oContext.fillRect(2 * nSize, (nCount - 7 + 2) * nSize, 3 * nSize, 3 * nSize);

            for (var i = 0; i < nCount - 8; i += 2) {
                _oContext.fillRect((8 + i) * nSize, 6 * nSize, nSize, nSize);
                _oContext.fillRect(6 * nSize, (8 + i) * nSize, nSize, nSize);
            }

            for (var i = 0; i < agnPatternCenter.length; i++) {
                for (var j = 0; j < agnPatternCenter.length; j++) {
                    var agnX = agnPatternCenter[j];
                    var agnY = agnPatternCenter[i];
                    if (agnX === 6 && (agnY === 6 || agnY === edgeCenter)) {
                        continue;
                    } else if (agnY === 6 && (agnX === 6 || agnX === edgeCenter)) {
                        continue;
                    } else if (agnX !== 6 && agnX !== edgeCenter && agnY !== 6 && agnY !== edgeCenter) {
                        _oContext.setFillStyle("rgba(0, 0, 0, .2)");
                        _drawAlign(_oContext, agnX, agnY, nSize, nSize);
                    } else {
                        _oContext.fillStyle = _htOption.colorDark;
                        _drawAlign(_oContext, agnX, agnY, nSize, nSize);
                    }
                }
            }

            // Fill the margin
            // if (whiteMargin) {
            //     _oContext.setFillStyle('#FFFFFF');
            //     _oContext.fillRect(-margin, -margin, size, margin);
            //     _oContext.fillRect(-margin, viewportSize, size, margin);
            //     _oContext.fillRect(viewportSize, -margin, margin, size);
            //     _oContext.fillRect(-margin, -margin, margin, size);
            // }

            if (_htOption.logoImage !== undefined) {
                var logoScale = _htOption.logoScale;
                var logoMargin = _htOption.logoMargin;
                var logoCornerRadius = _htOption.logoCornerRadius;
                if (logoScale <= 0 || logoScale >= 1.0) {
                    logoScale = 0.2;
                }
                if (logoMargin < 0) {
                    logoMargin = 0;
                }
                if (logoCornerRadius < 0) {
                    logoCornerRadius = 0;
                }

                _oContext.restore();

                var logoSize = viewportSize * logoScale;
                var x = 0.5 * (viewportSize - logoSize);
                var y = x;

                _oContext.setFillStyle('#FFFFFF');
                _oContext.save();
                _prepareRoundedCornerClip(_oContext, x - logoMargin, y - logoMargin, logoSize + 2 * logoMargin, logoSize + 2 * logoMargin, logoCornerRadius);
                _oContext.clip();
                _oContext.fill();
                _oContext.restore();

                _oContext.save();
                _prepareRoundedCornerClip(_oContext, x, y, logoSize, logoSize, logoCornerRadius);
                _oContext.clip();
                // const pattern = _oContext.createPattern(_htOption.logoImage, 'no-repeat')
                // _dContext.setFillStyle(pattern)
                _oContext.drawImage(_htOption.logoImage, x, y, logoSize, logoSize);
                _oContext.restore();
            }

            // if (gifBackground === undefined) {
            // Binarize the final image
            if (_htOption.binarize) {
                var pixels = _oContext.getImageData(0, 0, size, size);
                var threshold = 128;
                if (parseInt(_htOption.binarizeThreshold) > 0 && parseInt(_htOption.binarizeThreshold) < 255) {
                    threshold = parseInt(_htOption.binarizeThreshold);
                }
                for (var i = 0; i < pixels.data.length; i += 4) {
                    // rgb in [0, 255]
                    var R = pixels.data[i];
                    var G = pixels.data[i + 1];
                    var B = pixels.data[i + 2];
                    var sum = _greyscale(R, G, B);
                    if (sum > threshold) {
                        pixels.data[i] = 255;
                        pixels.data[i + 1] = 255;
                        pixels.data[i + 2] = 255;
                    } else {
                        pixels.data[i] = 0;
                        pixels.data[i + 1] = 0;
                        pixels.data[i + 2] = 0;
                    }
                }
                _oContext.putImageData(pixels, 0, 0);
            }

            _oContext.draw(false, () => {
                wx.canvasToTempFilePath({
                    canvasId: tempCanvasId,
                    width: viewportSize,
                    height: viewportSize,
                    quality: 1.0,
                    success: res => {
                        rawSize /= quality;
                        margin /= quality;
                        rawViewportSize /= quality;

                        if (whiteMargin) {
                            _dContext.setFillStyle('#FFFFFF');
                            _dContext.fillRect(0, 0, rawSize, rawSize);
                        }
                        _dContext.translate(margin, margin)
                        _dContext.drawImage(res.tempFilePath, 0, 0, rawViewportSize, rawViewportSize);
                        _dContext.draw()
                    }
                })
            })
        }

        // Painting work completed
        // this._bIsPainted = true;
        // }
    };

    // 保存为图片，将临时路径传给回调
    QRCode.prototype.exportImage = function(callback) {
        if (!callback) {
            return
        }
        wx.canvasToTempFilePath({
            x: 0,
            y: 0,
            width: this._htOption.width,
            height: this._htOption.height,
            destWidth: this._htOption.width,
            destHeight: this._htOption.height,
            canvasId: this.canvasId,
            success: function(res) {
                callback(res.tempFilePath)
            },
            fail: res => {
                console.log(res)
            }
        })
    }

    QRCode.CorrectLevel = QRErrorCorrectLevel;

    // test
    QRCode.prototype.getAverageRGB = getAverageRGB
})();

module.exports = QRCode